﻿using System;
using System.Collections;
using System.Collections.Generic;
using System.Configuration;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.UI;
using WFramework.Common;

namespace WFramework
{
    /// <summary>
    /// 水印的类型
    /// </summary>
    public enum WaterMarkType
    {
        /// <summary>
        /// 文字水印
        /// </summary>
        TextMark,
        /// <summary>
        /// 图片水印
        /// </summary>
        ImageMark // 暂时只能添加文字水印
    }

    /// <summary>
    /// 水印的位置
    /// </summary>
    public enum WaterMarkPosition
    {
        /// <summary>
        /// 左上角
        /// </summary>
        WMP_Left_Top,
        /// <summary>
        /// 左下角
        /// </summary>
        WMP_Left_Bottom,
        /// <summary>
        /// 右上角
        /// </summary>
        WMP_Right_Top,
        /// <summary>
        /// 右下角
        /// </summary>
        WMP_Right_Bottom
    }
    //// <summary>
    /// 处理图片的类（包括加水印，生成缩略图）
    /// </summary>
    public  class ImageWaterMark
    {
        public ImageWaterMark()
        {
            //
            // TODO: 在此处添加构造函数逻辑
            //
        }
        /// <summary>
        /// 可上传的文件格式
        /// </summary>
        private   readonly  string FileExtensions = ConfigurationManager.AppSettings["FileExtensions"] ?? ".doc|.docx|.gif|.jpg|.jpeg|.bmp|.png|.ico|.rar.zip";
        /// <summary>
        /// 上传商品图片的最大大小
        /// </summary>
        /// <summary>
        /// 可上传文件的最大大小
        /// </summary>
        private  readonly int FileMaxSize = ConfigurationManager.AppSettings["FileMaxSize"] == null
                                                      ? 1024 * 5
                                                      : Convert.ToInt32(ConfigurationManager.AppSettings["FileMaxSize"]);

        private   string GetSystemFilePath(string fileName)
        {
            int n = new System.Random().Next(100000);
            var savePath = string.Format("/Upload/SystemFile/{0}/{1}"
                                         , DateTime.Now.ToString("yyyyMM")
                                         , DateTime.Now.ToString("yyyyMMddHHmmssffff") + n.ToString() + Utils.GetFileExtName(fileName));
            var dir = Path.GetDirectoryName(HttpContext.Current.Server.MapPath(savePath));
            if (dir != null && !Directory.Exists(dir))
                Directory.CreateDirectory(dir);
            return savePath;
        }
        public   bool UploadFile(HttpPostedFileBase file, out string savePath, out string errMsg)
        {
            errMsg = string.Empty;
            savePath = string.Empty;

            if (file == null || file.ContentLength == 0)
            {
                errMsg = "请选择上传的文件";
                return false;
            }

            if (!FileExtensions.Contains(Utils.GetUrlSuffix(file.FileName)))
            {
                errMsg = "该文件不允许上传";
                return false;
            }

            if (file.ContentLength / 1024 > FileMaxSize)
            {
                errMsg = "文件过大，无法上传";
                return false;
            }

            //savePath = GetFilePath(DateTime.Now, file.FileName);
            savePath = GetSystemFilePath(file.FileName);
            var saveNewPath = HttpContext.Current.Server.MapPath(savePath);
              var waterPath = HttpContext.Current.Server.MapPath("/img/waterlogo.png");
            //file.SaveAs(HttpContext.Current.Server.MapPath(savePath));
             AddWaterMarkText(file.InputStream, saveNewPath, WaterMarkType.ImageMark, "秦时明月");
             
            return true;
        }

        /// <summary>
        /// 添加水印(分图片水印与文字水印两种)
        /// </summary>
        /// <param name="oldpath">原图片绝对地址</param>
        /// <param name="newpath">新图片放置的绝对地址(不可与原图片名相同)</param>
        /// <param name="wmtType">要添加的水印的类型</param>
        /// <param name="sWaterMarkContent">水印内容，此即为要添加的文字</param>
        public  void AddWaterMarkText(Stream stream,  string newpath, WaterMarkType wmtType, string sWaterMarkContent)
        {
            try
            {

                Image image = Image.FromStream(stream);
                Bitmap b = new Bitmap(image.Width, image.Height, PixelFormat.Format24bppRgb);
                Graphics g = Graphics.FromImage(b);
                g.Clear(Color.Beige);
                g.SmoothingMode = SmoothingMode.HighQuality;
                g.InterpolationMode = InterpolationMode.High;
                g.DrawImage(image, 0, 0, image.Width, image.Height);
                switch (wmtType)
                {
                    /**/
                    case WaterMarkType.ImageMark:
                    //图片水印
                        this.addWatermarkImage(g, Image.FromFile(HttpContext.Current.Server.MapPath("/img/waterlogo.png")),
                        "WM_BOTTOM_RIGHT", image.Width, image.Height);
                    break;
                    case WaterMarkType.TextMark:
                        //文字水印
                        this.addWatermarkText(g, sWaterMarkContent, "WM_BOTTOM_RIGHT",
                            image.Width, image.Height);
                        break;
                }
                b.Save(newpath);
                b.Dispose();
                image.Dispose();
            }
            catch
            {
                throw;
                
            }
            finally
            {
                
              
            }
        }



        //--------------------------------------------------------------------------------------
        ///  <summary> 
        /// 在图片上生成图片水印 
        ///  </summary> 
        ///  <param name="Path">原服务器图片路径 </param> 
        ///  <param name="Path_syp">生成的带图片水印的图片路径 </param> 
        ///  <param name="Path_sypf">水印图片路径 </param> 
        public void AddWaterPic(string Path, string Path_syp, string Path_sypf)
        {
            Image image = Image.FromFile(Path);
            Image copyImage = Image.FromFile(Path_sypf);
            Graphics g = Graphics.FromImage(image);
            Rectangle rect = new Rectangle(image.Width - copyImage.Width, image.Height - copyImage.Height, copyImage.Width, copyImage.Height);
            g.DrawImage(copyImage, rect, 0, 0, copyImage.Width, copyImage.Height, GraphicsUnit.Pixel);
            g.Dispose();
            image.Save(Path_syp);
            image.Dispose();
        }

        public void AddWaterPic(Stream stream, string Path_syp, string Path_sypf)
        {
            Image image = Image.FromStream(stream);
            Image copyImage = Image.FromFile(Path_sypf);
            Graphics g = Graphics.FromImage(image);
            Rectangle rect = new Rectangle(image.Width - copyImage.Width, image.Height - copyImage.Height, copyImage.Width, copyImage.Height);
            g.DrawImage(copyImage, rect, 0, 0, copyImage.Width, copyImage.Height, GraphicsUnit.Pixel);
            g.Dispose();
            image.Save(Path_syp);
            image.Dispose();
        }


        // 给图片加水印#region 给图片加水印
        /// <summary>
        /// 添加水印(分图片水印与文字水印两种)
        /// </summary>
        /// <param name="oldpath">原图片绝对地址</param>
        /// <param name="newpath">新图片放置的绝对地址(不可与原图片名相同)</param>
        /// <param name="wmtType">要添加的水印的类型</param>
        /// <param name="sWaterMarkContent">水印内容，若添加文字水印，此即为要添加的文字；
        /// 若要添加图片水印，此为图片的路径(图片水印暂不可用)</param>
        public void addWaterMark(string oldpath, string newpath,
            WaterMarkType wmtType, string sWaterMarkContent)
        {
            try
            {
                Image image = Image.FromFile(oldpath);
                Bitmap b = new Bitmap(image.Width, image.Height,
                    PixelFormat.Format24bppRgb);
                Graphics g = Graphics.FromImage(b);
                g.Clear(Color.Cornsilk);
                g.SmoothingMode = SmoothingMode.HighQuality;
                g.InterpolationMode = InterpolationMode.High;
                g.DrawImage(image, 0, 0, image.Width, image.Height);
                switch (wmtType)
                {
                    /**/
                    /*case WaterMarkType.ImageMark:
                    图片水印
                    this.addWatermarkImage(g, 
                        Page.Server.MapPath(Watermarkimgpath), 
                        WatermarkPosition,image.Width,image.Height);
                    break;*/
                    case WaterMarkType.TextMark:
                        //文字水印
                        this.addWatermarkText(g, sWaterMarkContent, "WM_BOTTOM_RIGHT",
                            image.Width, image.Height);
                        break;
                }
                b.Save(newpath);
                b.Dispose();
                image.Dispose();
            }
            catch
            {
                if (File.Exists(oldpath))
                {
                    //File.Delete(oldpath);
                }
            }
            finally
            {
                if (File.Exists(oldpath))
                {
                    // File.Delete(oldpath);
                }
            }
        }
        //public Bitmap SetTransparence(Bitmap bm, float transparence)
        //{
        //    if (transparence == 0.0f || transparence == 1.0f)
        //        throw new ArgumentException("透明度值只能在0.0f~1.0f之间");
        //    float[][] floatArray = 
        //    {
        //        new float[] { 1.0f, 0.0f, 0.0f, 0.0f, 0.0f }, 
        //        new float[] { 0.0f, 1.0f, 0.0f, 0.0f, 0.0f }, 
        //        new float[] { 0.0f, 0.0f, 1.0f, 0.0f, 0.0f }, 
        //        new float[] { 0.0f, 0.0f, 0.0f, transparence, 0.0f },
        //        new float[] { 0.0f, 0.0f, 0.0f, 0.0f, 1.0f } 
        //    };
        //    ImageAttributes imageAttributes = new ImageAttributes();
        //    imageAttributes.SetColorMatrix(new ColorMatrix(floatArray), ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
        //    Bitmap bitmap = new Bitmap(bm.Width, bm.Height);
        //    Graphics graphics = Graphics.FromImage(bitmap);
        //    graphics.DrawImage(bm, new Rectangle(0, 0, bm.Width, bm.Height), 0, 0, bm.Width, bm.Height, GraphicsUnit.Pixel, imageAttributes);
        //    graphics.Dispose();
        //    imageAttributes.Dispose();
        //    bm.Dispose();
        //    return bitmap;
        //}

        /**/
        /// <summary>
        ///  加水印文字
        /// </summary>
        /// <param name="picture">imge 对象</param>
        /// <param name="_watermarkText">水印文字内容</param>
        /// <param name="_watermarkPosition">水印位置</param>
        /// <param name="_width">被加水印图片的宽</param>
        /// <param name="_height">被加水印图片的高</param>
        private void addWatermarkText(Graphics picture, string _watermarkText,
            string _watermarkPosition, int _width, int _height)
        {
            // 确定水印文字的字体大小
            int[] sizes = new int[] { 32, 30, 28, 26, 24, 22, 20, 18, 16, 14, 12, 10, 8, 6, 4 };
            Font crFont = null;
            SizeF crSize = new SizeF();
            for (int i = 0; i < sizes.Length; i++)
            {
                crFont = new Font("微软雅黑", sizes[i], FontStyle.Bold);
                crSize = picture.MeasureString(_watermarkText, crFont);
                if ((ushort)crSize.Width < (ushort)_width)
                {
                    break;
                }
            }
            // 生成水印图片（将文字写到图片中）
            Bitmap floatBmp = new Bitmap((int)crSize.Width + 3,
                           (int)crSize.Height + 3, PixelFormat.Format32bppArgb);
            Graphics fg = Graphics.FromImage(floatBmp);
            PointF pt = new PointF(0, 0);
            // 画阴影文字
            Brush TransparentBrush0 = new SolidBrush(Color.FromArgb(255, Color.Black));
            Brush TransparentBrush1 = new SolidBrush(Color.FromArgb(255, Color.Black));
            fg.DrawString(_watermarkText, crFont, TransparentBrush0, pt.X, pt.Y + 1);
            fg.DrawString(_watermarkText, crFont, TransparentBrush0, pt.X + 1, pt.Y);
            fg.DrawString(_watermarkText, crFont, TransparentBrush1, pt.X + 1, pt.Y + 1);
            fg.DrawString(_watermarkText, crFont, TransparentBrush1, pt.X, pt.Y + 2);
            fg.DrawString(_watermarkText, crFont, TransparentBrush1, pt.X + 2, pt.Y);
            TransparentBrush0.Dispose();
            TransparentBrush1.Dispose();
            // 画文字
            fg.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
            fg.DrawString(_watermarkText,
                crFont, new SolidBrush(Color.White),
                pt.X, pt.Y, StringFormat.GenericDefault);
            // 保存刚才的操作
            fg.Save();
            fg.Dispose();
           // floatBmp = SetTransparence(floatBmp, 0.1f);
            // floatBmp.Save("d://WebSite//DIGITALKM//ttt.jpg");
            // 将水印图片加到原图中
            this.addWatermarkImage(
                picture,
                new Bitmap(floatBmp),
                "WM_BOTTOM_RIGHT",
                _width,
                _height);
        }
        /**/
        /// <summary>
        ///  加水印图片
        /// </summary>
        /// <param name="picture">imge 对象</param>
        /// <param name="iTheImage">Image对象（以此图片为水印）</param>
        /// <param name="_watermarkPosition">水印位置</param>
        /// <param name="_width">被加水印图片的宽</param>
        /// <param name="_height">被加水印图片的高</param>
        private void addWatermarkImage(Graphics picture, Image iTheImage,
            string _watermarkPosition, int _width, int _height)
        {
            Image watermark = new Bitmap(iTheImage);

            ImageAttributes imageAttributes = new ImageAttributes();
            //透明属性

            //ColorMap colorMap = new ColorMap();
            //colorMap.OldColor = Color.FromArgb(255, 0, 255, 0);
            //colorMap.NewColor = Color.FromArgb(0, 0, 0, 0);
            //ColorMap[] remapTable = { colorMap };
            //imageAttributes.SetRemapTable(remapTable, ColorAdjustType.Bitmap);
            //float[][] colorMatrixElements = {
            //                                    new float[] {1.0f, 0.0f, 0.0f, 0.0f, 0.0f},
            //                                    new float[] {0.0f, 1.0f, 0.0f, 0.0f, 0.0f},
            //                                    new float[] {0.0f, 0.0f, 1.0f, 0.0f, 0.0f},
            //                                    new float[] {0.0f, 0.0f, 0.0f, 0.3f, 0.0f},
            //                                    new float[] {0.0f, 0.0f, 0.0f, 0.0f, 1.0f}
            //                                };

            //ColorMatrix colorMatrix = new ColorMatrix(colorMatrixElements);

            //imageAttributes.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
            int xpos = 0;
            int ypos = 0;
            int WatermarkWidth = 0;
            int WatermarkHeight = 0;
            double bl = 1d;
            //计算水印图片的比率
            //取背景的1/4宽度来比较
            if ((_width > watermark.Width * 4) && (_height > watermark.Height * 4))
            {
                bl = 1;
            }
            else if ((_width > watermark.Width * 4) && (_height < watermark.Height * 4))
            {
                bl = Convert.ToDouble(_height / 4) / Convert.ToDouble(watermark.Height);

            }
            else if ((_width < watermark.Width * 4) && (_height > watermark.Height * 4))
            {
                bl = Convert.ToDouble(_width / 4) / Convert.ToDouble(watermark.Width);
            }
            else
            {
                if ((_width * watermark.Height) > (_height * watermark.Width))
                {
                    bl = Convert.ToDouble(_height / 4) / Convert.ToDouble(watermark.Height);

                }
                else
                {
                    bl = Convert.ToDouble(_width / 4) / Convert.ToDouble(watermark.Width);

                }

            }
            WatermarkWidth = Convert.ToInt32(watermark.Width * bl);
            WatermarkHeight = Convert.ToInt32(watermark.Height * bl);
            switch (_watermarkPosition)
            {
                case "WM_TOP_LEFT":
                    xpos = 10;
                    ypos = 10;
                    break;
                case "WM_TOP_RIGHT":
                    xpos = _width - WatermarkWidth - 10;
                    ypos = 10;
                    break;
                case "WM_BOTTOM_RIGHT":
                    xpos = _width - WatermarkWidth - 10;
                    ypos = _height - WatermarkHeight - 10;
                    break;
                case "WM_BOTTOM_LEFT":
                    xpos = 10;
                    ypos = _height - WatermarkHeight - 10;
                    break;
            }
            picture.DrawImage(
                watermark,
                new Rectangle(xpos, ypos, WatermarkWidth, WatermarkHeight),
                0,
                0,
                watermark.Width,
                watermark.Height,
                GraphicsUnit.Pixel,
                imageAttributes);
            watermark.Dispose();
            imageAttributes.Dispose();
        }
        /**/
        /// <summary>
        ///  加水印图片
        /// </summary>
        /// <param name="picture">imge 对象</param>
        /// <param name="WaterMarkPicPath">水印图片的地址</param>
        /// <param name="_watermarkPosition">水印位置</param>
        /// <param name="_width">被加水印图片的宽</param>
        /// <param name="_height">被加水印图片的高</param>
        private void addWatermarkImage(Graphics picture, string WaterMarkPicPath,
            string _watermarkPosition, int _width, int _height)
        {
            Image watermark = new Bitmap(WaterMarkPicPath);

            this.addWatermarkImage(picture, watermark, _watermarkPosition, _width,
                _height);
        }
        //生成缩略图#region 生成缩略图
        /**/
        /// <summary>
        /// 保存图片
        /// </summary>
        /// <param name="image">Image 对象</param>
        /// <param name="savePath">保存路径</param>
        /// <param name="ici">指定格式的编解码参数</param>
        private void SaveImage(Image image, string savePath, ImageCodecInfo ici)
        {
            //设置 原图片 对象的 EncoderParameters 对象
            EncoderParameters parameters = new EncoderParameters(1);
            parameters.Param[0] = new EncoderParameter(
                System.Drawing.Imaging.Encoder.Quality, ((long)90));
            image.Save(savePath, ici, parameters);
            parameters.Dispose();
        }
        /**/
        /// <summary>
        /// 获取图像编码解码器的所有相关信息
        /// </summary>
        /// <param name="mimeType">包含编码解码器的多用途网际邮件扩充协议 (MIME) 类型的字符串</param>
        /// <returns>返回图像编码解码器的所有相关信息</returns>
        private ImageCodecInfo GetCodecInfo(string mimeType)
        {
            ImageCodecInfo[] CodecInfo = ImageCodecInfo.GetImageEncoders();
            foreach (ImageCodecInfo ici in CodecInfo)
            {
                if (ici.MimeType == mimeType)
                    return ici;
            }
            return null;
        }
        /**/
        /// <summary>
        /// 生成缩略图
        /// </summary>
        /// <param name="sourceImagePath">原图片路径(相对路径)</param>
        /// <param name="thumbnailImagePath">生成的缩略图路径,如果为空则保存为原图片路径(相对路径)</param>
        /// <param name="thumbnailImageWidth">缩略图的宽度（高度与按源图片比例自动生成）</param>
        public void ToThumbnailImages(
            string SourceImagePath,
            string ThumbnailImagePath,
            int ThumbnailImageWidth)
        {
            Hashtable htmimes = new Hashtable();
            htmimes[".jpeg"] = "image/jpeg";
            htmimes[".jpg"] = "image/jpeg";
            htmimes[".png"] = "image/png";
            htmimes[".tif"] = "image/tiff";
            htmimes[".tiff"] = "image/tiff";
            htmimes[".bmp"] = "image/bmp";
            htmimes[".gif"] = "image/gif";
            // 取得原图片的后缀
            string sExt = SourceImagePath.Substring(
                SourceImagePath.LastIndexOf(".")).ToLower();
            //从 原图片 创建 Image 对象
            Image image = Image.FromFile(SourceImagePath);
            int num = ((ThumbnailImageWidth / 4) * 3);
            int width = image.Width;
            int height = image.Height;
            //计算图片的比例
            if ((((double)width) / ((double)height)) >= 1.3333333333333333f)
            {
                num = ((height * ThumbnailImageWidth) / width);
            }
            else
            {
                ThumbnailImageWidth = ((width * num) / height);
            }
            if ((ThumbnailImageWidth < 1) || (num < 1))
            {
                return;
            }
            //用指定的大小和格式初始化 Bitmap 类的新实例
            Bitmap bitmap = new Bitmap(ThumbnailImageWidth, num,
                PixelFormat.Format32bppArgb);
            //从指定的 Image 对象创建新 Graphics 对象
            Graphics graphics = Graphics.FromImage(bitmap);
            //清除整个绘图面并以透明背景色填充
            graphics.Clear(Color.Transparent);
            graphics.SmoothingMode = SmoothingMode.HighQuality;
            graphics.InterpolationMode = InterpolationMode.High;
            //在指定位置并且按指定大小绘制 原图片 对象
            graphics.DrawImage(image, new Rectangle(0, 0, ThumbnailImageWidth, num));
            image.Dispose();

            try
            {
                //将此 原图片 以指定格式并用指定的编解码参数保存到指定文件 
                SaveImage(bitmap, ThumbnailImagePath,
                    GetCodecInfo((string)htmimes[sExt]));
            }
            catch (System.Exception e)
            {
                throw e;
            }
        }
    }
}
